March Weather in Seiyo, Japan

Last updated: August 23, 2025

In March, the average temperature in Seiyo, Japan hovers around 9°C (49°F), with minimums dipping to -2°C (29°F) and peak highs reaching 22°C (72°F). Expect about 140 mm (5.5 in) of precipitation spread across 13 days, contributing to an average humidity level of 70%.

March Temperature in Seiyo

In March in Seiyo, the average temperature is a mild 9°C (49°F). Maximum temperatures can reach a comfortable 22°C (72°F), while the minimum can drop to a chilly -2°C (29°F). Overall, it's a good time for travelers to pack layers to enjoy a variety of weather conditions.

March Weather in Seiyo: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Seiyo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seiyo, March typically has an average temperature of 9°C (49°F), with highs reaching up to 22°C (72°F) and lows dropping to around -2°C (29°F).

Data source: Temperature data for Seiyo generated using information from the Copernicus Climate Change Service.

March Precipitation in Seiyo

In Seiyo in March, the total precipitation amount is 140 mm (5.5 in) over the course of 13 days.

March Precipitation Trends in Seiyo

The chart displays monthly precipitation patterns in Seiyo, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Seiyo, March typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in Seiyo

In Seiyo in March, humidity is 70%. With an average temperature of 9°C (49°F), this humidity feels like a chilly dampness that seeps into your bones, making it necessary to dress in layers and pack an umbrella for your travels.

March Average Humidity in Seiyo

This chart illustrates the average monthly humidity levels in Seiyo, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Seiyo is approximately 70%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Seiyo

In Seiyo in March, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Seiyo.

Maximum UV Index Levels in Seiyo for March

The chart shows the monthly maximum UV Index (UVI) for Seiyo in March, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In March, the maximum UV index in Seiyo typically reaches 9, which falls under the very high exposure category.

Data source: Seiyo March UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How March Weather in Seiyo Compares to Other Months

Weather in Seiyo varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Seiyo, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Seiyo, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	60 mm (2.4 inches)	74%	moderate
February Weather	5°C (41°F)	97 mm (3.8 inches)	70%	high
March Weather	9°C (49°F)	140 mm (5.5 inches)	70%	very high
April Weather	14°C (57°F)	140 mm (5.5 inches)	76%	very high
May Weather	18°C (65°F)	174 mm (6.8 inches)	82%	extreme
June Weather	22°C (71°F)	236 mm (9.3 inches)	86%	extreme
July Weather	25°C (78°F)	409 mm (16.1 inches)	91%	extreme
August Weather	27°C (80°F)	219 mm (8.6 inches)	88%	extreme
September Weather	23°C (74°F)	229 mm (9.0 inches)	85%	extreme
October Weather	18°C (64°F)	213 mm (8.4 inches)	82%	very high
November Weather	11°C (52°F)	62 mm (2.4 inches)	79%	high
December Weather	6°C (43°F)	69 mm (2.7 inches)	77%	moderate